Tamar is available for hire
Hire TamarTamar Japaridze
Verified Expert in Engineering
Back-end Developer
Tbilisi, Georgia
Toptal member since October 21, 2020
Bio
Tamar is an expert engineering professional with several years of experience as a back-end developer. Skilled in functional and object-oriented programming, scalable application development, RESTful APIs, and distributed applications (microservices), she is also familiar with Agile software development and the Agile and Scrum methodologies. Tamar has developed applications in medicine/healthcare, e-learning, and fintech.
Portfolio
Owens Corning - Digital Center of Excellence
Ruby on Rails (RoR), Microservices, Software Engineering, JavaScript, SQL...
Mastermind.com
Ruby, Ruby on Rails (RoR), RSpec, Stripe, PayPal, Payment APIs, MySQL...
Spin
PostgreSQL, Sidekiq, PostGIS, Ruby on Rails (RoR), Back-end, RSpec, APIs...
Experience
- GitFlow - 11 years
- Back-end Development - 11 years
- Ruby on Rails (RoR) - 11 years
- Agile Software Development - 10 years
- Redis - 10 years
- PostgreSQL - 10 years
- Elasticsearch - 5 years
- Amazon Web Services (AWS) - 4 years
Preferred Environment
Git, Heroku, RubyMine, Visual Studio Code (VS Code), MacOS, Ubuntu Linux
The most amazing...
...project I've worked on is an application that makes it easier for customers to access healthcare services.
Work Experience
Tech Lead
2024 - PRESENT
Owens Corning - Digital Center of Excellence
- Collaborated on back-end design for product features using Ruby on Rails and PostgreSQL.
- Orchestrated end-to-end release processes, ensuring seamless production deployment.
- Conducted thorough code reviews and quality checks to maintain high standards.
- Led feature development from idea to support, including business logic and integrations.
Technologies: Ruby on Rails (RoR), Microservices, Software Engineering, JavaScript, SQL, Back-end Development, CI/CD Pipelines, Unit Testing, Design Principles, Git, GitHub, GitFlow, Ruby, Agile Software Development, Amazon Web Services (AWS), Redis, Auditing, REST APIs, Security, Documentation, Reporting, React
Software Developer
2021 - 2023
Mastermind.com
- Developed an integration for PayPal, enabling sellers on our platform to offer their products via PayPal. Used RoR, MySQL, Sidekiq, PayPal API, PayPal SDK, JavaScript, and Heroku.
- Built a multi-payment gateway feature, allowing the sellers to connect with PayPal and Stripe. This solution covered seller onboarding processes as well as buyer payment functionalities. Utilized Ruby on Rails, MySQL, PayPal API, Stripe API, and Heroku.
- Undertook strategic refactoring of legacy functions to align with evolving business requirements. This exercise optimized codebase efficiency, streamlined operations, and prepared the system for future scalability (Ruby on Rails, Redis, MySQL, New Relic).
- Created a feature for discounts and coupons. This allowed sellers to design promotional campaigns by creating custom discounts and enabled buyers to avail of these promotions during product purchases (Ruby on Rails, MySQL, Stripe API, webhooks, JavaScript).
- Led feature development from ideation to support, including course ratings, business logic additions, and integrations (e.g., Zapier, Zoom). Managed full-cycle deployment. Utilized Ruby on Rails, various 3rd-party integrations, MySQL, Heroku, Sidekiq, and Redis.
- Reviewed Heroku metrics to ensure optimal app scalability and performance, efficiently scaling resources in response to demand. Implemented best practices in database optimization and query reduction based on insights from the Heroku metric.
- Conducted detailed codebase audits to identify areas for optimization and spearheaded the initiatives to refactor them, leading to more maintainable and scalable software.
- Managed Heroku deployments: configured environment variables, integrated add-ons (schedulers, mailers, Papertrail), monitored performance metrics, handled database migrations, optimized resources, and ensured security.
- Monitored application performance using New Relic, leading to the identification of potential bottlenecks before they impacted users. Built a series of alerting mechanisms using NR, ensuring rapid response to any unexpected app behavior or downtime.
- Guided junior developers and provided code reviews and ongoing support. Used Ruby on Rails, relational database, and GitHub.
Technologies: Ruby, Ruby on Rails (RoR), RSpec, Stripe, PayPal, Payment APIs, MySQL, Stripe API, Back-end, APIs, Code Review, Interviewing, Task Analysis, Team Management, API Development, SQL, Heroku, New Relic, Papertrail, Mailgun, Job Schedulers, Sidekiq, Third-party Integration, PostgreSQL, CSS, HTML, JavaScript, Software Engineering, Databases, Query Optimization, PayPal API, Stripe Connect, Stripe Payments, Stripe Subscriptions, CI/CD Pipelines, Unit Testing, Design Principles, Back-end Development, Git, GitHub, GitFlow, Agile Software Development, Redis, REST APIs, Security, Documentation, Reporting, React
Software Developer
2020 - 2020
Spin
- Built an integration for the Department for Transport UK. (RoR, PostgreSQL, PostGIS, Sidekiq).
- Developed an integration for MapIt UK. (RoR, PostgreSQL, PostGIS).
- Constructed an integration for Survey Monkey. (RoR, PostgreSQL).
Technologies: PostgreSQL, Sidekiq, PostGIS, Ruby on Rails (RoR), Back-end, RSpec, APIs, Code Review, API Development, SQL, Software Engineering, Databases, Query Optimization, CI/CD Pipelines, Unit Testing, Design Principles, Back-end Development, Git, GitHub, GitFlow, Ruby, Agile Software Development, Redis, REST APIs, Security, Documentation, Reporting, React
Software Development Team Lead
2017 - 2020
Vabaco
- Built a healthcare system for searching/booking a doctor's appointment, searching/buying medications, and receiving/using referrals and prescriptions (Ruby, PostgreSQL, AWS, and Elasticsearch). Considered using GDPR within the system.
- Developed an enterprise resource planning software solution for pharmacies to manage warehouses, financial modules, and integrations to external systems, including a detailed logging module (Ruby, PostgreSQL, GraphQL, Heroku, and Redis).
- Constructed a document flow system for companies to manage the flow of ordering and receiving resources (Ruby, PostgreSQL, and RabbitMQ).
- Created a healthcare system for patients and hospital medical chart registration (Ruby, PostgreSQL).
Technologies: Swagger, GraphQL, Heroku, Amazon Web Services (AWS), REST APIs, RESTful Development, Microservices, Elasticsearch, Microsoft SQL Server, PostgreSQL, Ruby on Rails (RoR), Ruby, Back-end, RSpec, APIs, Code Review, Interviewing, Technical Hiring, Source Code Review, Task Analysis, Team Management, SQL, Software Engineering, Databases, Query Optimization, CI/CD Pipelines, Unit Testing, Design Principles, Back-end Development, Git, GitHub, GitFlow, Agile Software Development, Redis, Security
Software Developer
2015 - 2017
TaxiTube
- Built a software system that enables users to create and manage their targeted campaigns on the monitors of taxi cabs (Scala, Akka HTTP, and Couchbase).
- Implemented a microservice that collects GPS information and calculates the data regarding taxi-cab mileage and work hours (Scala, Akka, Couchbase, and Play Framework).
- Developed a page for live-streaming monitor content and the current location of taxi cabs (Scala, Akka, Couchbase, and Play Framework).
- Implemented a router that connects services and devices. According to a published protocol, the router receives commands from services, translates the commands from services to devices, and back from devices to services.
Technologies: Domain-driven Design (DDD), Play Framework, Akka HTTP, Akka, Couchbase, NoSQL, Scala, Back-end, APIs, Code Review, Interviewing, Technical Hiring, Source Code Review, Task Analysis, Team Management, SQL, Software Engineering, Databases, Unit Testing, Design Principles, Back-end Development, Git, GitHub, GitFlow, Agile Software Development, Redis, REST APIs
Experience
EKIMO
https://apps.apple.com/us/app/ekimo/id1465560245?ls=1This mobile app allows customers to handle multiple tasks related to their medical care.
Features:
• Book an appointment with your preferred doctor
• Receive medical services without waiting in a line
• Search for medications
• Receive electronic prescriptions, referrals, diagnoses, and letters of guarantee
• Buy and receive medications from home
Features:
• Book an appointment with your preferred doctor
• Receive medical services without waiting in a line
• Search for medications
• Receive electronic prescriptions, referrals, diagnoses, and letters of guarantee
• Buy and receive medications from home
Education
2010 - 2014
Bachelor's Degree in Computer Science and Mathematics
Free University of Tbilisi - Tbilisi, Georgia
Certifications
NOVEMBER 2018 - PRESENT
Elasticsearch Developer
Udemy
FEBRUARY 2018 - PRESENT
Ruby Developer
SoloLearn
Skills
Libraries/APIs
REST APIs, Stripe, Stripe API, Sidekiq, PayPal API, Stripe Connect, API Development, React
Tools
GitHub, Bitbucket, RubyMine, Git, Jira, Amazon Simple Email Service (SES), Amazon ElastiCache, RSpec, Logstash, Kibana, RabbitMQ, AWS Glue, Papertrail
Languages
Ruby, SQL, GraphQL, Scala, CSS, HTML, JavaScript
Frameworks
Ruby on Rails (RoR), Swagger, Akka, Play Framework
Paradigms
Agile Software Development, RESTful Development, Microservices, Scrum, Unit Testing
Platforms
Heroku, Amazon Web Services (AWS), Ubuntu Linux, AWS Elastic Beanstalk, MacOS, Visual Studio Code (VS Code), New Relic, Mailgun
Storage
PostgreSQL, Redis, Elasticsearch, Databases, NoSQL, Couchbase, Microsoft SQL Server, Amazon S3 (AWS S3), Redshift, MySQL, PostGIS
Other
GitFlow, Web Development, Amazon Route 53, APIs, Back-end, Code Review, Technical Hiring, Source Code Review, Task Analysis, Software Engineering, Back-end Development, Auditing, Security, Documentation, Reporting, PayPal, Payment APIs, Interviewing, Team Management, Stripe Payments, Query Optimization, Akka HTTP, Domain-driven Design (DDD), Stripe Subscriptions, Job Schedulers, Third-party Integration, CI/CD Pipelines, Design Principles
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